Rudy...you should give Jeff from SOLO a call and show him this. He would love to see it.
The only thing you will have to worry about is how low the center exhaust sits...having put on a bunch of them on my own car, I will tell you that the position of the tips is lower than in your CAD diagram. The design is awesome, though. if you look at Norm's diffuser, you will see that the opening for the tips is at the bottom of the diffuser. There is a huge foam piece that sits very near the opening in your design. Just a heads up.